Kia Optima (2018) is 324 mm (12.76 inch) longer, 269 mm (10.59 inch) higher and has 140 liters (4.94 ft3) bigger cargo space than McLaren 570GT (2017).
McLaren 570GT (2017) is 236 mm (9.29 inch) wider and 65 kg (143 lbs) lighter than Kia Optima (2018).